Naomi Osaka stuns S. Williams to win her first Grand Slam title at U.S. Open

NEW YORK. KAZINFORM Naomi Osaka from Japan stunned American Serena Williams in straight sets in the U.S. Open women's singles final here on Saturday, clinching her first-ever Grand Slam title.

The 20th seed Osaka, only 20, overpowered six-time U.S. Open singles champions and 37-year-old Serena Williams, 6-2, 6-4 in one hour and 19 minutes, Xinhua reports.